Gaya APA

Bee, Helen L.. (1994). Lifespan development . New York: Harper Collins College.

Gaya Chicago

Bee, Helen L.. Lifespan development. New York: Harper Collins College, 1994. Text.

Gaya MLA

Bee, Helen L.. Lifespan development. New York: Harper Collins College, 1994. Text.

Gaya Turabian

Bee, Helen L.. Lifespan development. New York: Harper Collins College, 1994. Print.