Since salivary cortisol measurements are such an important part of my research proposal I tried to find multiple sources to get an idea of methodology. This study used salivary cortisol to test the stress levels in students who had lost a parent and perceived their surviving parent to be more or less caring. Those that had a parent they perceived as less caring had higher salivary cortisol levels after doing something stressful than those with a more caring parent. I thought this study was interesting and maybe slightly helpful when designing my methods section.
Luecken, L. J. (2000). Parental caring and loss during childhood and adult cortisol responses to stress. Psychology and Health, 15(6), 841-851.