McGaw, B., Ashby, G., & Perry, R. (1975). Interactions in the pre-school correspondence program. Research Branch, Dept. of Education [of] Queensland.

McGaw, Barry, Gerald Ashby, and Rosemary Perry. Interactions in the Pre-school Correspondence Program. [Brisbane]: Research Branch, Dept. of Education [of] Queensland, 1975.

McGaw, Barry, et al. Interactions in the Pre-school Correspondence Program. Research Branch, Dept. of Education [of] Queensland, 1975.