Não informado. (1919). Electrical Power Engineer. Electrical Power Engineers Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Electrical Power Engineer. Chertsey, Inglaterra: Electrical Power Engineers Association, 1919.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Electrical Power Engineer. Electrical Power Engineers Association, 1919.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.