Cita APA (7a ed.)

Willett, B. M. (1987). Philip's certificate atlas (4. ed.). Philip.

Cita Chicago Style (17a ed.)

Willett, B. M. Philip's Certificate Atlas. 4. ed. London: Philip, 1987.

Cita MLA (9a ed.)

Willett, B. M. Philip's Certificate Atlas. 4. ed. Philip, 1987.