http://www.issia.cnr.it/ http://www.ba.iac.cnr.it/wp/ https://ntnucamp.sce.ntnu.edu.tw/ http://leda.elfak.ni.ac.rs/

Gaya APA

Chappel, M, N. (1938). How To Control Worry (1). : PermaBooks.

Gaya MLA

Chappel, Matthew, N.. "How To Control Worry". 1 : PermaBooks, 1938. Non Fiction.