Cita APA (7a ed.)

Watkins, W. P. (1986). Cooperative principles today & tomorrow. Holyoake.

Cita Chicago Style (17a ed.)

Watkins, William Pascoe. Cooperative Principles Today & Tomorrow. Manchester: Holyoake, 1986.

Cita MLA (9a ed.)

Watkins, William Pascoe. Cooperative Principles Today & Tomorrow. Holyoake, 1986.