Παραπομπή σε μορφή APA (7η εκδ.)

Villegas, J. A. (1983). A resource book of ideascience: Instructional devices, projects, enrichment activities. SEAMEO-RECSAM and German Agency for Technical Cooperation (GTZ).

Παραπομπή σε μορφή Chicago (17η εκδ.)

Villegas, Jessie A. A Resource Book of Ideascience: Instructional Devices, Projects, Enrichment Activities. Penang, Malaysia: SEAMEO-RECSAM and German Agency for Technical Cooperation (GTZ), 1983.

Παραπομπή σε μορφή MLA (9th εκδ.)

Villegas, Jessie A. A Resource Book of Ideascience: Instructional Devices, Projects, Enrichment Activities. SEAMEO-RECSAM and German Agency for Technical Cooperation (GTZ), 1983.