de Jager Meezenbroek, E., Garssen, B., van den Berg, M., van Dierendonck, D., Visser, A., & Schaufeli, W. B. (2010). Measuring Spirituality as a Universal Human Experience: A Review of Spirituality Questionnaires. Springer US.

de Jager Meezenbroek, Eltica, Bert Garssen, Machteld van den Berg, Dirk van Dierendonck, Adriaan Visser, ja Wilmar B. Schaufeli. Measuring Spirituality As a Universal Human Experience: A Review of Spirituality Questionnaires. Springer US, 2010.

de Jager Meezenbroek, Eltica, et al. Measuring Spirituality As a Universal Human Experience: A Review of Spirituality Questionnaires. Springer US, 2010.