Cita APA (7th ed.)

NUGROHO, E., & DWIJONO, D. (1994). Belajar sendiri lotus 123 release 2.01, 2.2, 3.0. Andi Offset.

Cita Chicago (17th ed.)

NUGROHO, Eko, i Djoni DWIJONO. Belajar Sendiri Lotus 123 Release 2.01, 2.2, 3.0. Yogyakarta: Andi Offset, 1994.

Cita MLA (9th ed.)

NUGROHO, Eko, i Djoni DWIJONO. Belajar Sendiri Lotus 123 Release 2.01, 2.2, 3.0. Andi Offset, 1994.