APA (7th ed.) Citation

(1927). Immunization against diphtheria. [publisher not identified].

Chicago Style (17th ed.) Citation

Immunization Against Diphtheria. [Place of publication not identified]: [publisher not identified], 1927.

MLA (9th ed.) Citation

Immunization Against Diphtheria. [publisher not identified], 1927.

Warning: These citations may not always be 100% accurate.