Παραπομπή σε μορφή APA (7η εκδ.)

(1980). Contruction Principles, Materials And Methods/ Harold B. Olin, John L. Schmidt And Walter H. Lewis. The institute of financial education.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Contruction Principles, Materials And Methods/ Harold B. Olin, John L. Schmidt And Walter H. Lewis. The institute of financial education, 1980.

Παραπομπή σε μορφή MLA (8th εκδ.)

Contruction Principles, Materials And Methods/ Harold B. Olin, John L. Schmidt And Walter H. Lewis. The institute of financial education, 1980.