Cita APA (7th ed.)

Schumacher, G. (2010). Think! smarter: Zeitmanagement. Moses.

Cita Chicago (17th ed.)

Schumacher, Georg. Think! Smarter: Zeitmanagement. Kempen: Moses, 2010.

Cita MLA (8th ed.)

Schumacher, Georg. Think! Smarter: Zeitmanagement. Moses, 2010.