Becko, Jean "The child's learning of English morphology," Word , 14150-77, 1958.
2.
Clay, Marie M "Language skills: a comparison of Maori, Samoan and Pakeha children aged five to seven years," New Zealand Journal of Educational Studies, 5:2. 153-62, 1970.
3.
Clay, Marie M "The Polynesian language skills of Maori and Samoan school entrants ," International Journal of Pscyhology, 6:2, 135-45, 1971.
4.
Clay, Marie M "The development of morphological rules in children of differing language backgrounds," New Zealand Journal of Educational Studies, 9:2, 113-121, 1974.
5.
Dale, P.S. LanguageDevelopment: Structure and Function. Hinsdale, Illinois : The Dryden Press, 1972.
6.
Kirk, S.A. and McCarthy, J.J. "The Illinois Test of Psycholinguistic Abilities," Amer. J. Defic., 399-412, 1966.
7.
Osser, H., Wang, M.D. and Zaid, F. "The young child's ability to imitate and comprehend speech: a comparison of two sub-cultural groups," Child Development, 40, 1063-75, 1969.
8.
Presland, I.V. "Inflection skills: a comparison between Maori, Samoan and English children aged eight to ten years," Unpubl. Dip. Ed. Thesis, University of Auckland Library, 1973.
9.
Selby, S. "The development of morphological rules in children," Brit. J. Educ. Psychology, 42:5, 293-9, 1972.