Cita APA (7a ed.)

French, T. E., & Turnbull, W. D. (1950). Lessons in lettering: A series of practice books with text, examples and exercises. Book 1. McGraw-Hill.

Cita Chicago Style (17a ed.)

French, Thomas E., y William D. Turnbull. Lessons in Lettering: A Series of Practice Books with Text, Examples and Exercises. Book 1. New York: McGraw-Hill, 1950.

Cita MLA (9a ed.)

French, Thomas E., y William D. Turnbull. Lessons in Lettering: A Series of Practice Books with Text, Examples and Exercises. Book 1. McGraw-Hill, 1950.