Cita APA (7a ed.)

Sylvester, D. (1977). Enquiry in depth. McDougall.

Cita Chicago Style (17a ed.)

Sylvester, David. Enquiry in Depth. Edinburgh: McDougall, 1977.

Cita MLA (9a ed.)

Sylvester, David. Enquiry in Depth. McDougall, 1977.