Cita APA (7th ed.)

Atwater, R., Atwater, F., Kessel, E., & Lawson, R. (1949). Mr. Poppers Pinguine (11.-15. Tausend.). Alfred Holz Verlag.

Cita Chicago (17th ed.)

Atwater, Richard, Florence Atwater, Elisabeth Kessel, i Robert Lawson. Mr. Poppers Pinguine. 11.-15. Tausend. Berlin: Alfred Holz Verlag, 1949.

Cita MLA (8th ed.)

Atwater, Richard, et al. Mr. Poppers Pinguine. 11.-15. Tausend. Alfred Holz Verlag, 1949.