Como Dibujar el Rostro Humano - Emilio Freixas

The Art of Drawing People - Walter Foster.

How to Draw Comics - Cartoonstudies.org

Mangamania Romance - Chris Hart.

Human Anatomy for Artists - Eliot Goldfinger

How to Draw Mangas (Individual Moe Characters Basic Techniques).

Dibujo de la Anatomía y Estudio del Movimiento - Giovanni Civardi.

Anatomy for Artists - Glenn Fabry.

Fashion Illustration Art - Jennifer Lilya.

Drawing Manga Expressions and Poses - Anna Southgate & Keith Sparrow.

The Art of Drawing (Drawing Portraits) - Giovanni Civardi.

美少女的繪畫技巧與造型 - （日）美術出版社

[Ichijinsha] How to Draw the Shokusyu (Tentacles) [Chinese] [一迅社] 触手の描き方 [中国翻译]

Atlas for the Human Anatomy for the Artist - Stephen Rogers Peck

超人气漫画素描(可爱Q版篇)- 爱卡动漫

Retrato, Rostros y Expresiones - Parramón.

How to Draw Mangas (Individual Moe Characters Basic Techniques).

Drawing Manga Expressions and Poses - Anna Southgate and Keith Sparrow.