Richardson, D. (2004). Esperanto: Learning and using the international language (3rd ed.). Esperanto League for North America ; Orcas Publ..
Cita Chicago Style (17a ed.)Richardson, David. Esperanto: Learning and Using the International Language. 3rd ed. El Cerrito, CA : Eastsound, Wash.: Esperanto League for North America ; Orcas Publ., 2004.
Cita MLA (8a ed.)Richardson, David. Esperanto: Learning and Using the International Language. 3rd ed. Esperanto League for North America ; Orcas Publ., 2004.
Precaución: Estas citas no son 100% exactas.