Cita APA (7th ed.)

North Carolina. University. Graduate School. Research in progress. 1918. s. n.

Cita Chicago (17th ed.)

North Carolina. University. Graduate School. Research in Progress. 1918. Chapel Hill: s. n.

Cita MLA (9th ed.)

North Carolina. University. Graduate School. Research in Progress. 1918. s. n.

Atenció: Aquestes cites poden no estar 100% correctes.