APA

Stephens Ruan K,, . (1997). Teach yourself SQL in 21 days. New Delhi: Techmedia.

Chicago

Stephens Ruan K,, . 1997. Teach yourself SQL in 21 days. New Delhi: Techmedia.

Harvard

Stephens Ruan K,, . (1997). Teach yourself SQL in 21 days. New Delhi: Techmedia.

MLA

Stephens Ruan K,, . Teach yourself SQL in 21 days. New Delhi: Techmedia. 1997.