APA (7th ed.) Citation

Clum, H. D., Makinson, G. A., & Trueblood, E. C. (1930). Market for carbon paper, typewriter ribbons, and writing inks in Bolivia, Peru and Ecuador. [publisher not identified].

Chicago Style (17th ed.) Citation

Clum, Harold D., George A. Makinson, and Edward C. Trueblood. Market for Carbon Paper, Typewriter Ribbons, and Writing Inks in Bolivia, Peru and Ecuador. Washington, D.C.: [publisher not identified], 1930.

MLA (9th ed.) Citation

Clum, Harold D., et al. Market for Carbon Paper, Typewriter Ribbons, and Writing Inks in Bolivia, Peru and Ecuador. [publisher not identified], 1930.