Cita APA (7th ed.)

Umbach, W. (1991). Cosmetics and toiletries: Development, production, and use. Ellis Horwood.

Cita Chicago (17th ed.)

Umbach, Wilfried. Cosmetics and Toiletries: Development, Production, and Use. New York: Ellis Horwood, 1991.

Cita MLA (9th ed.)

Umbach, Wilfried. Cosmetics and Toiletries: Development, Production, and Use. Ellis Horwood, 1991.