Essa, E. (1999). Introduction to early childhood education (3rd ed.). Delmar.
芝加哥风格引文Essa, Eva. Introduction to Early Childhood Education. 3rd ed. Albany, N.Y: Delmar, 1999.
MLA引文Essa, Eva. Introduction to Early Childhood Education. 3rd ed. Delmar, 1999.
警告：这些引文格式不一定是100％准确.