APA (7th ed.) Citation

WIDIA S., T. (1976). Cobol programming jilid I. Modern Computer Course.

Chicago Style (17th ed.) Citation

WIDIA S., Th. Cobol Programming Jilid I. Modern Computer Course, 1976.

MLA (8th ed.) Citation

WIDIA S., Th. Cobol Programming Jilid I. Modern Computer Course, 1976.

Warning: These citations may not always be 100% accurate.