APA (7th ed.) Citation

Citrine, W. M. L. (1940). My Finnish diary. Penguin books limited.

Chicago Style (17th ed.) Citation

Citrine, Walter Mac Lennan. My Finnish Diary. Harmondsworth, Middlesex, Eng ; New York: Penguin books limited, 1940.

MLA (9th ed.) Citation

Citrine, Walter Mac Lennan. My Finnish Diary. Penguin books limited, 1940.