Cita APA (7a ed.)

Schmall, V. L., & Pratt, C. (1986). Special friends: Elders & pets. [s.n.].

Cita Chicago Style (17a ed.)

Schmall, Vicki L., y Clara Pratt. Special Friends: Elders & Pets. [S.l.]: [s.n.], 1986.

Cita MLA (9a ed.)

Schmall, Vicki L., y Clara Pratt. Special Friends: Elders & Pets. [s.n.], 1986.