APA

Lepkowski J. M., Mosher W. D., Davis K. E., Groves R. M., van Hoewyk J. & Willem J. (20061017). National Survey of Family Growth, Cycle 6: sample design, weighting, imputation, and variance estimation. : Vital and health statistics. Series 2, Data evaluation and methods research.

Chicago

Lepkowski James M, Mosher William D, Davis Karen E, Groves Robert M, van Hoewyk John and Willem Jennifer. 20061017. National Survey of Family Growth, Cycle 6: sample design, weighting, imputation, and variance estimation. : Vital and health statistics. Series 2, Data evaluation and methods research.

Harvard

Lepkowski J. M., Mosher W. D., Davis K. E., Groves R. M., van Hoewyk J. and Willem J. (20061017). National Survey of Family Growth, Cycle 6: sample design, weighting, imputation, and variance estimation. : Vital and health statistics. Series 2, Data evaluation and methods research.

MLA

Lepkowski James M, Mosher William D, Davis Karen E, Groves Robert M, van Hoewyk John and Willem Jennifer. National Survey of Family Growth, Cycle 6: sample design, weighting, imputation, and variance estimation. : Vital and health statistics. Series 2, Data evaluation and methods research. 20061017.