Maceda, W. (1971). Biology: The science of living things; laboratory manual and workbook. Felta Book Sales.
Lua i Stíl Chicago (17ú heag.)Maceda, Wilfredo. Biology: The Science of Living Things; Laboratory Manual and Workbook. Manila: Felta Book Sales, 1971.
Lua MLA (9ú heag.)Maceda, Wilfredo. Biology: The Science of Living Things; Laboratory Manual and Workbook. Felta Book Sales, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.