Cita APA (7th ed.)
CHRISTENSEN, L., & ET AL. (1990). EXPECTANCY EFFECTS IN CAFFEINE RESEARCH.
Cita Chicago (17th ed.)
CHRISTENSEN, L., i ET AL. EXPECTANCY EFFECTS IN CAFFEINE RESEARCH. 1990.
Cita MLA (9th ed.)
CHRISTENSEN, L., i ET AL. EXPECTANCY EFFECTS IN CAFFEINE RESEARCH. 1990.
Atenció: Aquestes cites poden no estar 100% correctes.