Cita APA (7th ed.)

Vogel. (2013). How to Gain Gain (2.). Springer Berlin Heidelberg.

Cita Chicago (17th ed.)

Vogel. How to Gain Gain. 2. Springer Berlin Heidelberg, 2013.

Cita MLA (8th ed.)

Vogel. How to Gain Gain. 2. Springer Berlin Heidelberg, 2013.