APA (7th ed.) Citation
Penny, R. K., & Marriott, D. L. (1971). Desing for creep. [s.n.].
Chicago Style (17th ed.) Citation
Penny, R. K., and D. L. Marriott. Desing for Creep. [s.l.]: [s.n.], 1971.
MLA (9th ed.) Citation
Penny, R. K., and D. L. Marriott. Desing for Creep. [s.n.], 1971.
Warning: These citations may not always be 100% accurate.