Cita APA (7th ed.)
De Grijs, R. (2011). An introduction to distance measurement in astronomy. John Wiley & Sons.
Cita Chicago (17th ed.)
De Grijs, Richard. An Introduction to Distance Measurement in Astronomy. Chichester, West Sussex ; Hoboken, N.J.: John Wiley & Sons, 2011.
Cita MLA (9th ed.)
De Grijs, Richard. An Introduction to Distance Measurement in Astronomy. John Wiley & Sons, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.