APA ציטוט

Astanin, L. P., & Blagosklonov, K. N. (1983). Conservation of nature. Progress publishers.

Chicago Edition Citation

Astanin, L P., and K N. Blagosklonov. Conservation of Nature. Moscow: Progress publishers, 1983.

ציטוט MLA

Astanin, L P., and K N. Blagosklonov. Conservation of Nature. Progress publishers, 1983.