Cita APA (7a ed.)

Von Hagen, V. W. (1948). The green world of the naturalists: A treasury of... Greenberg.

Cita Chicago Style (17a ed.)

Von Hagen, Victor Wofgang. The Green World of the Naturalists: A Treasury of... New York: Greenberg, 1948.

Cita MLA (9a ed.)

Von Hagen, Victor Wofgang. The Green World of the Naturalists: A Treasury of... Greenberg, 1948.