Roojen, P. V. Structural Package Designs: Pepin Van Roojen.
Cita Chicago (17th ed.)Roojen, Pepin Van. Structural Package Designs: Pepin Van Roojen.
Cita MLA (8th ed.)Roojen, Pepin Van. Structural Package Designs: Pepin Van Roojen.
Atenció: Aquestes cites poden no estar 100% correctes.