Cita APA

Achtenhagen, O., & Achtenhagen, O. (1960). Four novels for adventure: Teacher's manual. New York, New York: Harcourt Brace and World.

Citación estilo Chicago

Achtenhagen, Olga, y Olga Achtenhagen. Four Novels for Adventure: Teacher's Manual. New York, New York: Harcourt Brace and World, 1960.

Cita MLA

Achtenhagen, Olga, y Olga Achtenhagen. Four Novels for Adventure: Teacher's Manual. New York, New York: Harcourt Brace and World, 1960.