Παραπομπή APA

Yourdon, E. . .., Gane, C. . .., Lister, . T. . .., & Sarson, . T. . .. (1979). Learning to programm in structured cobol: Parts 1and 2. Prentice Hall of India.

Παραπομπή Chicago Style

Yourdon, Edward ., Chris Gane, Timothy Lister, και Trish Sarson. Learning to Programm in Structured Cobol: Parts 1and 2. New Delhi: Prentice Hall of India, 1979.

Παραπομπή MLA

Yourdon, Edward ., et al. Learning to Programm in Structured Cobol: Parts 1and 2. Prentice Hall of India, 1979.