APA (7th ed.) Citation

Bastian, U., Röser, S., & Wielen, R. (1991). PPM South: A reference star catalogue for the southern hemisphere preliminary version. Astronomy & astrophysics. Supplement series, 87, .

Chicago Style (17th ed.) Citation

Bastian, Ulrich, Siegfried Röser, and Roland Wielen. "PPM South: A Reference Star Catalogue for the Southern Hemisphere Preliminary Version." Astronomy & Astrophysics. Supplement Series 87 (1991).

MLA (9th ed.) Citation

Bastian, Ulrich, et al. "PPM South: A Reference Star Catalogue for the Southern Hemisphere Preliminary Version." Astronomy & Astrophysics. Supplement Series, vol. 87, 1991.