एपीए उद्धरण

Pettifor, J. M., Ross, F. P., & Solomon, L. (1978). Seasonal variation in serum 25-hydroxycholecalciferol concentrations in elderly South African patients with fractures of femoral neck.

शिकागो स्टाइल उद्धरण

Pettifor, J M., F P. Ross, और L. Solomon. Seasonal Variation in Serum 25-hydroxycholecalciferol Concentrations in Elderly South African Patients With Fractures of Femoral Neck. 1978.

एमएलए उद्धरण

Pettifor, J M., F P. Ross, और L. Solomon. Seasonal Variation in Serum 25-hydroxycholecalciferol Concentrations in Elderly South African Patients With Fractures of Femoral Neck. 1978.