Cita APA (7th ed.)

Hays, R. (1965). Principles of technical writing. Addison-Wesley Publishing Company.

Cita Chicago (17th ed.)

Hays, Robert. Principles of Technical Writing. Massachusetts: Addison-Wesley Publishing Company, 1965.

Cita MLA (9th ed.)

Hays, Robert. Principles of Technical Writing. Addison-Wesley Publishing Company, 1965.