APA (7th ed.) Citation

(1977). Sociale vaardigheden. Henri Polakstichting.

Chicago Style (17th ed.) Citation

Sociale Vaardigheden. Henri Polakstichting, 1977.

MLA (8th ed.) Citation

Sociale Vaardigheden. Henri Polakstichting, 1977.

Warning: These citations may not always be 100% accurate.