APA (7th ed.) Citation

Bowles, O., & Lee, C. V. (1930). Feldspar. [publisher not identified].

Chicago Style (17th ed.) Citation

Bowles, Oliver, and C. V. Lee. Feldspar. Washington, D.C.: [publisher not identified], 1930.

MLA (9th ed.) Citation

Bowles, Oliver, and C. V. Lee. Feldspar. [publisher not identified], 1930.