Cita APA (7th ed.)

ILWIS 1.3. (1992). Ilwis 1.3 user's manual volume 2. ITC.

Cita Chicago (17th ed.)

ILWIS 1.3. Ilwis 1.3 User's Manual Volume 2. Netherlands: ITC, 1992.

Cita MLA (9th ed.)

ILWIS 1.3. Ilwis 1.3 User's Manual Volume 2. ITC, 1992.