APA

Krey A. C., . (1958). The First Crusade: the accounts of eye-witnesses and participants. Gloucester, Mass: P. Smith.

Chicago

Krey August C, . 1958. The First Crusade: the accounts of eye-witnesses and participants. Gloucester, Mass: P. Smith.

Harvard

Krey A. C., . (1958). The First Crusade: the accounts of eye-witnesses and participants. Gloucester, Mass: P. Smith.

MLA

Krey August C, . The First Crusade: the accounts of eye-witnesses and participants. Gloucester, Mass: P. Smith. 1958.