Randell, S. K. (1974). A study of religious concepts of some Papua New Guinean and expatriate primary school children. Teaching Methods and Materials Centre, University of Papua New Guinea.
Lua i Stíl Chicago (17ú heag.)Randell, Shirley K. A Study of Religious Concepts of Some Papua New Guinean and Expatriate Primary School Children. [Port Moresby]: Teaching Methods and Materials Centre, University of Papua New Guinea, 1974.
Lua MLA (9ú heag.)Randell, Shirley K. A Study of Religious Concepts of Some Papua New Guinean and Expatriate Primary School Children. Teaching Methods and Materials Centre, University of Papua New Guinea, 1974.