SpetchM. L., & WilkieD. M. (1983). Subjective shortening: A model of pigeon's memory for event duration.Journal of Experimental Psychology: Animal Behavior Processes,9, 14–30.
2.
TardenerH. (1981, December). Do babies sing a universal song?Psychology Today, pp. 70–76.
3.
WeinsteinT. M. (1985). The careful writer: A modern guide to English usage.New York: Atheneum.
4.
YoungS., & CannonC. R. (Eds.). (1980). Bilingual education: Teaching English as a second language.New York: Praeger.
5.
ZacharyA. S., & KniskernD. P. (1981). Family therapy outcome research: Knowns and unknowns. In GurmanA. S. & KniskernD. P. (Eds.), Handbook of family therapy (pp. 742–775). New York: Brunner/Mazel.