, 1988, The implications of differential theory appraisal and the context of discovery for advancing theory in psychology, in L. Mos (ed.), Recent trends in theoretical psychology, Dordrecht, Springer, pp. 59-64.
, 1987, A strategy for developing unifying theory in psychology, in A. W. Staats & L. Mos (eds.), Annals of theoretical psychology, Dordrecht, Springer, pp. 275-285.
, 1985a, The problem of theoretical pluralism in psychology, in L. Mos (ed.), Annals of theoretical psychology, Dordrecht, Springer, pp. 297-315.
, 1985b, The problem of theoretical pluralism in psychology, in L. Mos (ed.), Annals of theoretical psychology, Dordrecht, Springer, pp. 339-343.
with Coward, H. G. , 1981, Toward an epistemological basis for humanistic psychology, in J. R. Royce & L. Mos (eds.), Humanistic psychology, Dordrecht, Springer, pp. 109-134.
with Mos, L. (eds) , 1981a, Humanistic psychology: concepts and criticisms, Springer, Dordrecht.