diff --git a/quechua.bib b/quechua.bib
index 32f51bc..dcded05 100644
--- a/quechua.bib
+++ b/quechua.bib
@@ -631,6 +631,13 @@
 	author = {{De Granda}, Germán}
 }
 
+@Book{grodin1990metodo,
+	publisher = {Los Amigos del Libro},
+	year = {1990},
+	title = {Metodo de Quechua},
+	author = {Grodin N., Marcelo}
+}
+
 @Book{gualapuro2018kichwa,
 	publisher = {Universidad de San Francisco de Quito Press},
 	year = {2018},
@@ -1525,6 +1532,13 @@
 	author = {Urioste, Jorge L.}
 }
 
+@Book{villarroel2014waskarwan,
+	publisher = {Editoria H \& P},
+	year = {2014},
+	title = {Waskarwan Jatun Tatanwan},
+	author = {Quiroz Villarroel, Alfredo}
+}
+
 @Book{weber1976suffix,
 	publisher = {Instituto Lingüístico de Verano},
 	year = {1976},