APA
Presented to the Federal Assembly 1961, Presented to the Federal Assembly 1961, . (1961). Director of civil aviation. Salisbury: The Government Printer.
Chicago
Presented to the Federal Assembly 1961, Presented to the Federal Assembly 1961, . 1961. Director of civil aviation. Salisbury: The Government Printer.
Harvard
Presented to the Federal Assembly 1961, Presented to the Federal Assembly 1961, . (1961). Director of civil aviation. Salisbury: The Government Printer.
MLA
Presented to the Federal Assembly 1961, Presented to the Federal Assembly 1961, . Director of civil aviation. Salisbury: The Government Printer. 1961.