APA (7th ed.) Citation

Philippines. Bureau of Customs. (1923). Signals to be hoisted at signal tower, Engineer Island. [publisher not identified].

Chicago Style (17th ed.) Citation

Philippines. Bureau of Customs. Signals to Be Hoisted at Signal Tower, Engineer Island. Manila, Philippines: [publisher not identified], 1923.

MLA (9th ed.) Citation

Philippines. Bureau of Customs. Signals to Be Hoisted at Signal Tower, Engineer Island. [publisher not identified], 1923.