APA (7th ed.) Citation

Gregiry, P. N. (1991). Sudden and gradual. Motilala Banarsidas Publishers.

Chicago Style (17th ed.) Citation

Gregiry, Peter N. Sudden and Gradual. Delhi: Motilala Banarsidas Publishers, 1991.

MLA (9th ed.) Citation

Gregiry, Peter N. Sudden and Gradual. Motilala Banarsidas Publishers, 1991.

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