Education Development Center. Educational Services Incorporated. (1967). Introductory physical science. United Publishing.
Citazione stile Chigago Style (17a edizione)Education Development Center. Educational Services Incorporated. Introductory Physical Science. Manila: United Publishing, 1967.
Citatione MLA (9a ed.)Education Development Center. Educational Services Incorporated. Introductory Physical Science. United Publishing, 1967.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.