APA (7th ed.) Citation

Atwater, R., Atwater, F., Kessel, E., & Lawson, R. (1949). Mr. Poppers Pinguine (o.A.). Alfred Holz Verlag.

Chicago Style (17th ed.) Citation

Atwater, Richard, Florence Atwater, Elisabeth Kessel, and Robert Lawson. Mr. Poppers Pinguine. o.A. Berlin: Alfred Holz Verlag, 1949.

MLA (8th ed.) Citation

Atwater, Richard, et al. Mr. Poppers Pinguine. o.A. Alfred Holz Verlag, 1949.