APA (7th ed.) Citation

Sklar, D. (2016). Learning PHP: A gentle introduction to the Web's most popular language (First edition.). O'Reilly.

Chicago Style (17th ed.) Citation

Sklar, David. Learning PHP: A Gentle Introduction to the Web's Most Popular Language. First edition. Beijing, [China]: O'Reilly, 2016.

MLA (9th ed.) Citation

Sklar, David. Learning PHP: A Gentle Introduction to the Web's Most Popular Language. First edition. O'Reilly, 2016.