(1988). The GRAMPS operating system: User's guide / Peter Manbach; Michael Shneier.
Cita Chicago (17th ed.)The GRAMPS Operating System: User's Guide / Peter Manbach; Michael Shneier. 1988.
Cita MLA (9th ed.)The GRAMPS Operating System: User's Guide / Peter Manbach; Michael Shneier. 1988.
Atenció: Aquestes cites poden no estar 100% correctes.