FARB PETER. (1983). ECOLOGY (2.). TIME LIFE BOOKS.
Cita Chicago (17th ed.)FARB PETER. ECOLOGY. 2. HONGKONG: TIME LIFE BOOKS, 1983.
Cita MLA (9th ed.)FARB PETER. ECOLOGY. 2. TIME LIFE BOOKS, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.