APA (7th ed.) Citation

Ytterstad, E. Frailty in Survival Analysis of Widowhood Mortality. Wiley.

Chicago Style (17th ed.) Citation

Ytterstad, Elinor. Frailty in Survival Analysis of Widowhood Mortality. Wiley.

MLA (9th ed.) Citation

Ytterstad, Elinor. Frailty in Survival Analysis of Widowhood Mortality. Wiley.

Warning: These citations may not always be 100% accurate.