Sol LeWitt : Four basic kinds of straight lines and their combinations : 1. Vertical ; 2. Horizontal ; 3. Diagonal l. to r. ; 4. Diagonal r. to l. and their combinations.

MLA

Sol Lewitt : Four Basic Kinds of Straight Lines and Their Combinations : 1. Vertical ; 2. Horizontal ; 3. Diagonal L. to R. ; 4. Diagonal R. to L. and Their Combinations. London: Studio International, 1969.

APA

(1969). Sol LeWitt : Four basic kinds of straight lines and their combinations : 1. Vertical ; 2. Horizontal ; 3. Diagonal l. to r. ; 4. Diagonal r. to l. and their combinations. London: Studio International.

Chicago

Sol Lewitt: Four Basic Kinds of Straight Lines and Their Combinations : 1. Vertical ; 2. Horizontal ; 3. Diagonal L. to R. ; 4. Diagonal R. to L. and Their Combinations. London: Studio International, 1969.