Citazione Stile APA (7a Edizione)

Kelsey, C., & Gray, H. (1986). The feasibility study process for parks and recreation. American Association for Leisure and Recreation.

Citazione stile Chigago Style (17a edizione)

Kelsey, Craig, e Howard Gray. The Feasibility Study Process for Parks and Recreation. Reston, Va: American Association for Leisure and Recreation, 1986.

Citatione MLA (9a ed.)

Kelsey, Craig, e Howard Gray. The Feasibility Study Process for Parks and Recreation. American Association for Leisure and Recreation, 1986.