Cita APA (7th ed.)

Beckwith, J., Bergquist, C., & Hildebrand, R. (1986). How to design & build children's play equipment. Ortho Books.

Cita Chicago (17th ed.)

Beckwith, Jay, Craig Bergquist, i Ron Hildebrand. How to Design & Build Children's Play Equipment. San Francisco, Calif: Ortho Books, 1986.

Cita MLA (9th ed.)

Beckwith, Jay, et al. How to Design & Build Children's Play Equipment. Ortho Books, 1986.