APA (7th ed.) Citation

Kropotkin, P. A., & Zemliak, M. (1977). Obras. Anagrama.

Chicago Style (17th ed.) Citation

Kropotkin, Piotr Alexeievich, and Martin Zemliak. Obras. Barcelona: Anagrama, 1977.

MLA (9th ed.) Citation

Kropotkin, Piotr Alexeievich, and Martin Zemliak. Obras. Anagrama, 1977.

Warning: These citations may not always be 100% accurate.