Wijk-Sijbesma, C.A. van, Baumann, E., Bhatia, R., Kolsky, P., y Chilton, J., «Learning from experience : evaluation of UNICEF's water and environmental sanitation programme in India, 1966-1998», vol. no. 01/04. UNICEF, New York, NY, USA, p. xxx, 76 p. + 234 p. annexes : 7 boxes, 7 fig., 6 tab., 2000.

Wijk-Sijbesma, C.A. van, Smet, J.E.M., Bastemeijer, T.F., Gondwe, H.A., Magonya, S.N., y Majumdar, J., «The DANIDA financed rural water supply programme in Iringa, Mbeya and Ruvuma Regions of Tanzania : report prepared by a joint evaluation mission from May 23th to June 20th 1987». DANIDA, Ministry of Foreign Affairs, Copenhagen, Denmark, p. 93 p.: tab., 1987.

Wijk-Sijbesma, C.A. van y Visscher, J.T., «Handpump projects : avoiding neglect», World water, pp. p. 44-46: photogr., 1987.