Cita APA (7th ed.)

Gregorio, E. 1. (1973). A proposed plan of supervision of health instruction in the public elementary schools in the city of Manila. s.n.].

Cita Chicago (17th ed.)

Gregorio, Elisa 1921. A Proposed Plan of Supervision of Health Instruction in the Public Elementary Schools in the City of Manila. [Quezon City: s.n.], 1973.

Cita MLA (9th ed.)

Gregorio, Elisa 1921. A Proposed Plan of Supervision of Health Instruction in the Public Elementary Schools in the City of Manila. s.n.], 1973.