Cita APA (7th ed.)

(1988). Observe (MENSUAL-BIMENSUAL.). Association Psychological Science.

Cita Chicago (17th ed.)

Observe. MENSUAL-BIMENSUAL. Washington DC, Estados Unidos: Association Psychological Science, 1988.

Cita MLA (9th ed.)

Observe. MENSUAL-BIMENSUAL. Association Psychological Science, 1988.