Leon, W. d. The Alabang serum and vaccine laboratories and their rehabilitation with FOA-PHILCUSA aid. National Media Production Center.
Čikaški stil citiranja (17. izdanje)Leon, Walfrido de. The Alabang Serum and Vaccine Laboratories and Their Rehabilitation with FOA-PHILCUSA Aid. Manila: National Media Production Center.
MLA način citiranja (9. izdanje)Leon, Walfrido de. The Alabang Serum and Vaccine Laboratories and Their Rehabilitation with FOA-PHILCUSA Aid. National Media Production Center.
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