APA (7th ed.) Citation

Freeden, W., & Kersten, H. (1980). The geodetic boundary-value problem using the known surface of the earth.

Chicago Style (17th ed.) Citation

Freeden, Willi, and Heinrich Kersten. The Geodetic Boundary-value Problem Using the Known Surface of the Earth. Aachen, 1980.

MLA (9th ed.) Citation

Freeden, Willi, and Heinrich Kersten. The Geodetic Boundary-value Problem Using the Known Surface of the Earth. 1980.

Warning: These citations may not always be 100% accurate.