Cita APA (7th ed.)

Sims, W. S., & Armstrong, B. (2015). 21st century Sims: Innovation, education, and leadership for the modern era. Naval Institute Press.

Cita Chicago (17th ed.)

Sims, William Sowden, i Benjamin Armstrong. 21st Century Sims: Innovation, Education, and Leadership for the Modern Era. Annapolis, Maryland: Naval Institute Press, 2015.

Cita MLA (9th ed.)

Sims, William Sowden, i Benjamin Armstrong. 21st Century Sims: Innovation, Education, and Leadership for the Modern Era. Naval Institute Press, 2015.