APA Citation

Heinroth, O., & Heinroth, K. (1958). The birds. New York: [k.n.x.b].

Chicago Style Citation

Heinroth, Oskar., and Katharina Heinroth. The Birds. New York: [k.n.x.b], 1958.

MLA Citation

Heinroth, Oskar., and Katharina Heinroth. The Birds. New York: [k.n.x.b], 1958.

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