APA (7th ed.) Citation

Means, F. (1956). Knock at the door, Emmy. Houghton.

Chicago Style (17th ed.) Citation

Means, Florence. Knock at the Door, Emmy. [S.l.]: Houghton, 1956.

MLA (9th ed.) Citation

Means, Florence. Knock at the Door, Emmy. Houghton, 1956.

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