एपीए उद्धरण

(1998). Helping clients understand vaccination. Guelph [Ont.]: Lifelearn.

शिकागो स्टाइल उद्धरण

Helping Clients Understand Vaccination. Guelph [Ont.]: Lifelearn, 1998.

एमएलए उद्धरण

Helping Clients Understand Vaccination. Guelph [Ont.]: Lifelearn, 1998.