Pop, V. J., Pommer, A. M., Pop-Purceleanu , M., Wijnen, H. A., Bergink, V., & Pouwer, F. (2011). Development of the Tilburg Pregnancy Distress Scale: The TPDS. BioMed Central.

Pop, Victor JM, Antoinette M. Pommer, Monica Pop-Purceleanu , Hennie AA Wijnen, Veerle Bergink, ja Frans Pouwer. Development of the Tilburg Pregnancy Distress Scale: The TPDS. BioMed Central, 2011.

Pop, Victor JM, et al. Development of the Tilburg Pregnancy Distress Scale: The TPDS. BioMed Central, 2011.