APA (7th ed.) Citation

Ngan, M., & Yuen, F. (1993). An updated version of the real-time rainfall data acquisition system of the Royal Observatory. Govt. Printer.

Chicago Style (17th ed.) Citation

Ngan, Man-ho, and Fu-tat Yuen. An Updated Version of the Real-time Rainfall Data Acquisition System of the Royal Observatory. Hong Kong: Govt. Printer, 1993.

MLA (9th ed.) Citation

Ngan, Man-ho, and Fu-tat Yuen. An Updated Version of the Real-time Rainfall Data Acquisition System of the Royal Observatory. Govt. Printer, 1993.