APA সাইটেশন

Heck, H. (1993). UNIX: Working with UNIX and XENIX. Prisma computer courses.

শিকাগো স্টাইলে সাইটেশন

Heck, Hans-Josef. UNIX: Working with UNIX and XENIX. Great Britain: Prisma computer courses, 1993.

এমএলএ সাইটেশন

Heck, Hans-Josef. UNIX: Working with UNIX and XENIX. Prisma computer courses, 1993.