Παραπομπή APA

(1977). Explanatory supplement to the Astronomical ephemeris and the American ephemeris and nautical almanac. London: H. M. Stationery Off..

Παραπομπή Chicago Style

Explanatory Supplement to the Astronomical Ephemeris and the American Ephemeris and Nautical Almanac. London: H. M. Stationery Off., 1977.

Παραπομπή MLA

Explanatory Supplement to the Astronomical Ephemeris and the American Ephemeris and Nautical Almanac. London: H. M. Stationery Off., 1977.

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