APA (7th ed.) Citation

Smith, R. V., & Smith, R. V. (2005). The Delhi that no-one knows. Chronicle Books.

Chicago Style (17th ed.) Citation

Smith, Ronald Vivian, and R. V. Smith. The Delhi That No-one Knows. Chronicle Books, 2005.

MLA (9th ed.) Citation

Smith, Ronald Vivian, and R. V. Smith. The Delhi That No-one Knows. Chronicle Books, 2005.

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