APA aipamena

Puffer, R. R. (1987). Patterns of birthweights. Pan American Health Organization.

Chicago Style aipamena

Puffer, Ruth Rice. Patterns of Birthweights. Washington, D.C: Pan American Health Organization, 1987.

MLA aipamena

Puffer, Ruth Rice. Patterns of Birthweights. Pan American Health Organization, 1987.