APA (7th ed.) Citation

Wulf, T., & Smith, C. J. (1930). Modern physics: A general survey of its principles. Methuen & co., ltd.

Chicago Style (17th ed.) Citation

Wulf, Theodor, and Clarence Joseph Smith. Modern Physics: A General Survey of Its Principles. London: Methuen & co., ltd, 1930.

MLA (8th ed.) Citation

Wulf, Theodor, and Clarence Joseph Smith. Modern Physics: A General Survey of Its Principles. Methuen & co., ltd, 1930.