Cita APA (7th ed.)
Arndt, R. Saudi Aramco World: March - April 2006, vol. 57, no. 2 : Volcanic Arabia. Aramco Services.
Cita Chicago (17th ed.)
Arndt, Robert. Saudi Aramco World: March - April 2006, Vol. 57, No. 2 : Volcanic Arabia. Houston, EUA: Aramco Services.
Cita MLA (9th ed.)
Arndt, Robert. Saudi Aramco World: March - April 2006, Vol. 57, No. 2 : Volcanic Arabia. Aramco Services.
Atenció: Aquestes cites poden no estar 100% correctes.