Maceda, W. (1971). Biology: The science of living things; laboratory manual and workbook. Felta Book Sales.
Chicago-referens (17:e uppl.)Maceda, Wilfredo. Biology: The Science of Living Things; Laboratory Manual and Workbook. Manila: Felta Book Sales, 1971.
MLA-referens (9:e uppl.)Maceda, Wilfredo. Biology: The Science of Living Things; Laboratory Manual and Workbook. Felta Book Sales, 1971.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.