APA

Comstock J. H., . (1948). The spider book: a manual for the study of the spiders and their near relatives, the scorpions, pseudoscorpions, whip-scorpions, harvestmen, and other members of the class Arachnida, found in America north of Mexico, with analytical keys for their classification and popular accounts of their habits. Ithaca, N.Y: Comstock Pub. Co.

Chicago

Comstock John Henry, . 1948. The spider book: a manual for the study of the spiders and their near relatives, the scorpions, pseudoscorpions, whip-scorpions, harvestmen, and other members of the class Arachnida, found in America north of Mexico, with analytical keys for their classification and popular accounts of their habits. Ithaca, N.Y: Comstock Pub. Co.

Harvard

Comstock J. H., . (1948). The spider book: a manual for the study of the spiders and their near relatives, the scorpions, pseudoscorpions, whip-scorpions, harvestmen, and other members of the class Arachnida, found in America north of Mexico, with analytical keys for their classification and popular accounts of their habits. Ithaca, N.Y: Comstock Pub. Co.

MLA

Comstock John Henry, . The spider book: a manual for the study of the spiders and their near relatives, the scorpions, pseudoscorpions, whip-scorpions, harvestmen, and other members of the class Arachnida, found in America north of Mexico, with analytical keys for their classification and popular accounts of their habits. Ithaca, N.Y: Comstock Pub. Co. 1948.