APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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