Não informado. News of the Surveying and Mapping Division of ASCE. American Society of Civil Engineers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. News of the Surveying and Mapping Division of ASCE. New York: American Society of Civil Engineers.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. News of the Surveying and Mapping Division of ASCE. American Society of Civil Engineers.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.