Citazione APA

Jeffreys, M. (1962). Personal values in the modern world. Penguin books.

Stile di citazione Chicago

Jeffreys, M.V.C. Personal Values in the Modern World. England: Penguin books, 1962.

Citazione MLA

Jeffreys, M.V.C. Personal Values in the Modern World. Penguin books, 1962.