Cita APA (7th ed.)

Haywood, R. (1987). All about P R. Mc Graw Hill.

Cita Chicago (17th ed.)

Haywood, Roger. All About P R. London: Mc Graw Hill, 1987.

Cita MLA (9th ed.)

Haywood, Roger. All About P R. Mc Graw Hill, 1987.