APA (7th ed.) Citation

Heilborn, A. (1930). Der Frosch. Brehm.

Chicago Style (17th ed.) Citation

Heilborn, Adolf. Der Frosch. Berlin: Brehm, 1930.

MLA (9th ed.) Citation

Heilborn, Adolf. Der Frosch. Brehm, 1930.

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