Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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