Cita APA (7th ed.)

Watt, A. (1887). The art of soap-making: A practical handbook (3a. ed.). Crosby.

Cita Chicago (17th ed.)

Watt, Alexander. The Art of Soap-making: A Practical Handbook. 3a. ed. London: Crosby, 1887.

Cita MLA (9th ed.)

Watt, Alexander. The Art of Soap-making: A Practical Handbook. 3a. ed. Crosby, 1887.