Santos, A. (1990). Ang sistema ni Propesor Tuko. The Philippine Educational Theater Asso. Documentation, Research and Publication Division (PETA-ERP).
Παραπομπή σε μορφή Chicago (17η εκδ.)Santos, Al. Ang Sistema Ni Propesor Tuko. [Manila}: The Philippine Educational Theater Asso. Documentation, Research and Publication Division (PETA-ERP), 1990.
Παραπομπή σε μορφή MLA (9th εκδ.)Santos, Al. Ang Sistema Ni Propesor Tuko. The Philippine Educational Theater Asso. Documentation, Research and Publication Division (PETA-ERP), 1990.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.