APA ציטוט

GILBERTSON, D. (1989). Practical Ecology For Geography And Biology. Croom Helm.

Chicago Style (17th ed.) Citation

GILBERTSON, DD. Practical Ecology For Geography And Biology. Croom Helm, 1989.

ציטוט MLA

GILBERTSON, DD. Practical Ecology For Geography And Biology. Croom Helm, 1989.