Gaya APA
Spock, D, B., Needlman, D, R. (2011).
Dr Spock's Baby & Childcare 9th edition .
United Kingdom:
Simon & Schuster.
Gaya MLA
Spock, Dr, Benjamin., Needlman, Dr, Robert.
"Dr Spock's Baby & Childcare 9th edition".
United Kingdom:
Simon & Schuster,
2011.
Buku Text.