APA Format
. ([s.a.]). Childhood immunization: what you need to know: a handbook for health workers and parents. Seatle : Children's Vaccine Program
MLA Format
. Childhood immunization: what you need to know: a handbook for health workers and parents. Seatle : Children's Vaccine Program, [s.a.]
Australian/Harvard Format
. [s.a.]. Childhood immunization: what you need to know: a handbook for health workers and parents. Children's Vaccine Program, Seatle
Warning: These citations may not always be 100% accurate.