Cita APA (7a ed.)

Green, S., & Green, J. (2012). Encouraging early sports skills. Andrews UK.

Cita Chicago Style (17a ed.)

Green, Sandy, y Jake Green. Encouraging Early Sports Skills. Luton: Andrews UK, 2012.

Cita MLA (8a ed.)

Green, Sandy, y Jake Green. Encouraging Early Sports Skills. Andrews UK, 2012.