APA (7th ed.) Citation

Åkerman, N. (1993). The Necessity of friction: Nineteen essays on a vital force. Physica-Verlag.

Chicago Style (17th ed.) Citation

Åkerman, Nordal. The Necessity of Friction: Nineteen Essays on a Vital Force. Heidelberg: Physica-Verlag, 1993.

MLA (9th ed.) Citation

Åkerman, Nordal. The Necessity of Friction: Nineteen Essays on a Vital Force. Physica-Verlag, 1993.

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