Cita APA

Hertwig, R., & Kingsley, J. S. (1902). A manual of zoology. H. Holt and Co..

Chicago Style (17th ed.) Citation

Hertwig, Richard, i J. S. Kingsley. A Manual of Zoology. New York: H. Holt and Co., 1902.

Cita MLA

Hertwig, Richard, i J. S. Kingsley. A Manual of Zoology. H. Holt and Co., 1902.