APA

Hora B., . (1980). The Oxford encyclopedia of trees of the world. Oxford: Oxford University Press.

Chicago

Hora Bayard, . 1980. The Oxford encyclopedia of trees of the world. Oxford: Oxford University Press.

Harvard

Hora B., . (1980). The Oxford encyclopedia of trees of the world. Oxford: Oxford University Press.

MLA

Hora Bayard, . The Oxford encyclopedia of trees of the world. Oxford: Oxford University Press. 1980.