APA
Douglas A., . (1949). Electronic musical instrument manual. London: Sir Isaac Pitman & Sons.
Chicago
Douglas Alan, . 1949. Electronic musical instrument manual. London: Sir Isaac Pitman & Sons.
Harvard
Douglas A., . (1949). Electronic musical instrument manual. London: Sir Isaac Pitman & Sons.
MLA
Douglas Alan, . Electronic musical instrument manual. London: Sir Isaac Pitman & Sons. 1949.