Cita APA (7a ed.)

Searle, M. S., & Jackson, E. L. (1985). Socioeconomic variations in perceived barriers to recreation participation among would-be participants. [s.n.].

Cita Chicago Style (17a ed.)

Searle, Mark S., y Edgar Lionel Jackson. Socioeconomic Variations in Perceived Barriers to Recreation Participation Among Would-be Participants. [S.l.]: [s.n.], 1985.

Cita MLA (9a ed.)

Searle, Mark S., y Edgar Lionel Jackson. Socioeconomic Variations in Perceived Barriers to Recreation Participation Among Would-be Participants. [s.n.], 1985.