Παραπομπή APA

Robert, E. . .. (1950). Extraction of Non-ferrous metals. Temple press ltd Bowling Green lane.

Παραπομπή Chicago Style

Robert, E.R. Extraction of Non-ferrous Metals. London: Temple press ltd Bowling Green lane, 1950.

Παραπομπή MLA

Robert, E.R. Extraction of Non-ferrous Metals. Temple press ltd Bowling Green lane, 1950.