Cita APA (7th ed.)

Doell, C. E., & Twardzik, L. F. (1973). Elements of part and recreation administration (3rd ed.). Burgess.

Cita Chicago (17th ed.)

Doell, Charles Edward, i Louis F. Twardzik. Elements of Part and Recreation Administration. 3rd ed. Minneapolis: Burgess, 1973.

Cita MLA (9th ed.)

Doell, Charles Edward, i Louis F. Twardzik. Elements of Part and Recreation Administration. 3rd ed. Burgess, 1973.