APA (7th ed.) Citation

Engelbrektson, S. (1963). Gravity at work and play. Holt, Rinehart and Winston.

Chicago Style (17th ed.) Citation

Engelbrektson, Sune. Gravity at Work and Play. New York: Holt, Rinehart and Winston, 1963.

MLA (9th ed.) Citation

Engelbrektson, Sune. Gravity at Work and Play. Holt, Rinehart and Winston, 1963.