Gallardo, F. E., & De Guzman, R. P. (1960). The organization and management of the Department of Health, as of April, 1959. National College of Public Administration and Governance, University of the Philippines Diliman.

Gallardo, F. Ed, and Raul P. De Guzman. The Organization and Management of the Department of Health, as of April, 1959. Quezon City: National College of Public Administration and Governance, University of the Philippines Diliman, 1960.

Gallardo, F. Ed, and Raul P. De Guzman. The Organization and Management of the Department of Health, as of April, 1959. National College of Public Administration and Governance, University of the Philippines Diliman, 1960.