Cita APA (7th ed.)

Atwater, R. (1951). Mr. Poppers Pinguine. Alfred Holz Verlag.

Cita Chicago (17th ed.)

Atwater, Richard. Mr. Poppers Pinguine. Berlin: Alfred Holz Verlag, 1951.

Cita MLA (8th ed.)

Atwater, Richard. Mr. Poppers Pinguine. Alfred Holz Verlag, 1951.