APA (7th ed.) Citation

Speck, F. G., Bailey, A. G., & Weitzner, B. (1912). Algonquin materials, Frank G. Speck Papers.

Chicago Style (17th ed.) Citation

Speck, Frank G., Alfred Goldsworthy Bailey, and Bella Weitzner. Algonquin Materials, Frank G. Speck Papers. 1912.

MLA (9th ed.) Citation

Speck, Frank G., et al. Algonquin Materials, Frank G. Speck Papers. 1912.