APA (7th ed.) Citation

Spock, B. (2001). The firts two years: The emotional and physical needs of children from birth to age two. Pocket Books.

Chicago Style (17th ed.) Citation

Spock, Benjamin. The Firts Two Years: The Emotional and Physical Needs of Children from Birth to Age Two. New York: Pocket Books, 2001.

MLA (9th ed.) Citation

Spock, Benjamin. The Firts Two Years: The Emotional and Physical Needs of Children from Birth to Age Two. Pocket Books, 2001.