APA (7th ed.) Citation

Grock, Pemberton, M., & Behrens, E. (1931). Grock life's a lark / by Grock: Life's a lark. William Heinemann.

Chicago Style (17th ed.) Citation

Grock, Madge Pemberton, and Eduard Behrens. Grock Life's a Lark / by Grock: Life's a Lark. London: William Heinemann, 1931.

MLA (9th ed.) Citation

Grock, et al. Grock Life's a Lark / by Grock: Life's a Lark. William Heinemann, 1931.

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