APA (7th ed.) Citation

(1980). Your blood may be valuable for making a new vaccine against hepatitis B, now at epidemic levels in gay men (Rev. 11/80.). [publisher not identified].

Chicago Style (17th ed.) Citation

Your Blood May Be Valuable for Making a New Vaccine Against Hepatitis B, Now at Epidemic Levels in Gay Men. Rev. 11/80. [United States?]: [publisher not identified], 1980.

MLA (9th ed.) Citation

Your Blood May Be Valuable for Making a New Vaccine Against Hepatitis B, Now at Epidemic Levels in Gay Men. Rev. 11/80. [publisher not identified], 1980.