توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Queensland. Dept. of Education. Bernard Van Leer Foundation Project. (1970). Research report on some aspects of the language development of pre-school children. Dept. of Education, Queensland.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Queensland. Dept. of Education. Bernard Van Leer Foundation Project. Research Report on Some Aspects of the Language Development of Pre-school Children. Brisbane: Dept. of Education, Queensland, 1970.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Queensland. Dept. of Education. Bernard Van Leer Foundation Project. Research Report on Some Aspects of the Language Development of Pre-school Children. Dept. of Education, Queensland, 1970.