Cita APA (7a ed.)

(2003). Stepping Tones: Bd. 1.2.3 / Wilko Brouwers. Ward Centrum Nederland.

Cita Chicago Style (17a ed.)

Stepping Tones: Bd. 1.2.3 / Wilko Brouwers. ['s-Hertogenbosch]: Ward Centrum Nederland, 2003.

Cita MLA (8a ed.)

Stepping Tones: Bd. 1.2.3 / Wilko Brouwers. Ward Centrum Nederland, 2003.