APA (7th ed.) Citation

Zwiers, H. J. (1911). Preliminary investigation into the motion of the pole of the earth in 1907. s.n.

Chicago Style (17th ed.) Citation

Zwiers, Hendrikus Johannes. Preliminary Investigation into the Motion of the Pole of the Earth in 1907. [S.l.: s.n, 1911.

MLA (9th ed.) Citation

Zwiers, Hendrikus Johannes. Preliminary Investigation into the Motion of the Pole of the Earth in 1907. s.n, 1911.