University of the Philippines National Sciences Development Board. (1965). Biology for Philippine High Schools : The Relationships of living things: Teacher's guide. Phoenix Publishing.
Citazione stile Chigago Style (17a edizione)University of the Philippines National Sciences Development Board. Biology for Philippine High Schools : The Relationships of Living Things: Teacher's Guide. Manila: Phoenix Publishing, 1965.
Citatione MLA (9a ed.)University of the Philippines National Sciences Development Board. Biology for Philippine High Schools : The Relationships of Living Things: Teacher's Guide. Phoenix Publishing, 1965.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.