APA (7th ed.) Citation

Varghese, M. M. (1991). S. R. Ranganathan's Theory of Reference Service.

Chicago Style (17th ed.) Citation

Varghese, Manoj M. S. R. Ranganathan's Theory of Reference Service. 1991.

MLA (9th ed.) Citation

Varghese, Manoj M. S. R. Ranganathan's Theory of Reference Service. 1991.

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