APA (7th ed.) Citation

Pannekoek, A. (1913). The Variability of the Pole-star. s.n.

Chicago Style (17th ed.) Citation

Pannekoek, Anton. The Variability of the Pole-star. [S.l.: s.n, 1913.

MLA (9th ed.) Citation

Pannekoek, Anton. The Variability of the Pole-star. s.n, 1913.

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