APA (7th ed.) Citation

Helwig, D. (1971). The day before tomorrow. Oberon Press.

Chicago Style (17th ed.) Citation

Helwig, David. The Day Before Tomorrow. [Ottawa]: Oberon Press, 1971.

MLA (8th ed.) Citation

Helwig, David. The Day Before Tomorrow. Oberon Press, 1971.

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