APA

Wachtel H., . (1969). Aquarium ecology. U.S.A: .

Chicago

Wachtel Hellmuth, . 1969. Aquarium ecology. U.S.A: .

Harvard

Wachtel H., . (1969). Aquarium ecology. U.S.A: .

MLA

Wachtel Hellmuth, . Aquarium ecology. U.S.A: . 1969.