Cita APA (7th ed.)

Grumman, R. M. (1947). University extension in action. s.n.

Cita Chicago (17th ed.)

Grumman, Russell Marvin. University Extension in Action. Chapel Hill: s.n, 1947.

Cita MLA (9th ed.)

Grumman, Russell Marvin. University Extension in Action. s.n, 1947.