Caffeine - Psychology bibliographies - in Harvard style

In-text: (Hameleers et al., 2000)

Your Bibliography: Hameleers, P., Van Boxtel, M., Hogervorst, E., Riedel, W., Houx, P., Buntinx, F. and Jolles, J., 2000. Habitual caffeine consumption and its relation to memory, attention, planning capacity and psychomotor performance across multiple age groups. Hum. Psychopharmacol. Clin. Exp., 15(8), pp.573-581.

In-text: (Regina, Smith, Keiper and McKelvey, 1974)

Your Bibliography: Regina, E., Smith, G., Keiper, C. and McKelvey, R., 1974. Effects of caffeine on alertness in simulated automobile driving. Journal of Applied Psychology, 59(4), pp.483-489.

In-text: (Revelle, Amaral and Turriff, 1976)

Your Bibliography: Revelle, W., Amaral, P. and Turriff, S., 1976. Introversion/extroversion, time stress, and caffeine: effect on verbal performance. Science, 192(4235), pp.149-150.