APA-Zitierstil (7. Ausg.)

Hiemstra, B. (1938). Dark Clouds in Kapteyn's special areas 2, 5, 9, and 24 and the proper motions of the stars in these regions. Hoitsema.

Chicago-Zitierstil (17. Ausg.)

Hiemstra, B. Dark Clouds in Kapteyn's Special Areas 2, 5, 9, and 24 and the Proper Motions of the Stars in These Regions. Groningen: Hoitsema, 1938.

MLA-Zitierstil (9. Ausg.)

Hiemstra, B. Dark Clouds in Kapteyn's Special Areas 2, 5, 9, and 24 and the Proper Motions of the Stars in These Regions. Hoitsema, 1938.