Cita APA (7a ed.)

Johnson, H. M. (1968). Sociology: A systematic introduction ([6th impression].). Routledge & Kegan Paul.

Cita Chicago Style (17a ed.)

Johnson, Harry Morton. Sociology: A Systematic Introduction. [6th impression]. London: Routledge & Kegan Paul, 1968.

Cita MLA (9a ed.)

Johnson, Harry Morton. Sociology: A Systematic Introduction. [6th impression]. Routledge & Kegan Paul, 1968.