APA (7 ম সংস্করণ) উদ্ধৃতি

Langdon-Dahm, M. (1986). Trade secrets: 25 proven success tools for working, dealing ... Learning development systems.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Langdon-Dahm, Martha. Trade Secrets: 25 Proven Success Tools for Working, Dealing ... Dayton: Learning development systems, 1986.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Langdon-Dahm, Martha. Trade Secrets: 25 Proven Success Tools for Working, Dealing ... Learning development systems, 1986.