Παραπομπή σε μορφή APA (7η εκδ.)

Welch, W. W. (1971). A summary of research in science education for the years of 1968-69 secondary school level. ERIC.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Welch, Wayne W. A Summary of Research in Science Education for the Years of 1968-69 Secondary School Level. Ohio, Estados Unidos: ERIC, 1971.

Παραπομπή σε μορφή MLA (9th εκδ.)

Welch, Wayne W. A Summary of Research in Science Education for the Years of 1968-69 Secondary School Level. ERIC, 1971.