Cita APA (7th ed.)

Ratcliffe, S., & Wilt, D. (1973). Proceedings Seventh National Shellfish Sanitation Workshop. Public Health Service.

Cita Chicago (17th ed.)

Ratcliffe, Stanley, i Deborah Wilt. Proceedings Seventh National Shellfish Sanitation Workshop. Washington, D.C: Public Health Service, 1973.

Cita MLA (9th ed.)

Ratcliffe, Stanley, i Deborah Wilt. Proceedings Seventh National Shellfish Sanitation Workshop. Public Health Service, 1973.