Citazione APA

Ark, L. v. d., Ligtvoet, R., Marvelde, J. M. t., & Sijtsma, K. Investigating an invariant item ordering for polytomously scored items.

Stile di citazione Chicago

Ark, L.Andries van der., Rudy Ligtvoet, Janneke M. te Marvelde, e Klaas Sijtsma. Investigating an Invariant Item Ordering for Polytomously Scored Items.

Citazione MLA

Ark, L.Andries van der., Rudy Ligtvoet, Janneke M. te Marvelde, e Klaas Sijtsma. Investigating an Invariant Item Ordering for Polytomously Scored Items.

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