Havighurst, R. J. (1972). Development tasks and education (3rd ed.). David McKay Company, Inc..
Citación estilo ChicagoHavighurst, Robert James. Development Tasks and Education. 3rd ed. New york: David McKay Company, Inc., 1972.
Cita MLAHavighurst, Robert James. Development Tasks and Education. 3rd ed. David McKay Company, Inc., 1972.
Warning: These citations may not always be 100% accurate.