APA

(2007). Geoid. Surabaya: Department of Geomatics Engineering, Faculty of Civil, Environment and Earth Engineering Sepuluh Nopember Institute of Technology (ITS).

Chicago

2007. Geoid. Surabaya: Department of Geomatics Engineering, Faculty of Civil, Environment and Earth Engineering Sepuluh Nopember Institute of Technology (ITS).

Harvard

(2007). Geoid. Surabaya: Department of Geomatics Engineering, Faculty of Civil, Environment and Earth Engineering Sepuluh Nopember Institute of Technology (ITS).

MLA

Geoid. Surabaya: Department of Geomatics Engineering, Faculty of Civil, Environment and Earth Engineering Sepuluh Nopember Institute of Technology (ITS). 2007.