APA استشهاد

Ong, A. D., & Dulmen, M. H. V. (2007). Oxford handbook of methods in positive psychology. Oxford University Press.

استشهاد بنمط شيكاغو

Ong, Anthony D., و Manfred H.M. Van Dulmen. Oxford Handbook of Methods in Positive Psychology. Oxford: Oxford University Press, 2007.

MLA استشهاد

Ong, Anthony D., و Manfred H.M. Van Dulmen. Oxford Handbook of Methods in Positive Psychology. Oxford University Press, 2007.