Strandberg, V. H. (1980). Taproots of a Poem: The Long Foreground of ’Old Nigger on One-Mule Cart’. In R. Gray (Ed.), Robert Penn Warren: A Collection of Critical Essays (pp. 143–154). Englewood Cliffs, NJ: Prentice-Hall.

Strandberg, V. H. “Taproots of a Poem: The Long Foreground of ’Old Nigger on One-Mule Cart’.” In Robert Penn Warren: A Collection of Critical Essays, edited by R. Gray, 143–54. Englewood Cliffs, NJ: Prentice-Hall, 1980.

Strandberg VH. Taproots of a Poem: The Long Foreground of ’Old Nigger on One-Mule Cart’. In: Gray R, editor. Robert Penn Warren: A Collection of Critical Essays. Englewood Cliffs, NJ: Prentice-Hall; 1980. p. 143–54.

Strandberg, V. H. “Taproots of a Poem: The Long Foreground of ’Old Nigger on One-Mule Cart’.” Robert Penn Warren: A Collection of Critical Essays, edited by R. Gray, Englewood Cliffs, NJ: Prentice-Hall, 1980, pp. 143–54.

Strandberg VH. Taproots of a Poem: The Long Foreground of ’Old Nigger on One-Mule Cart’. In: Gray R, editor. Robert Penn Warren: A Collection of Critical Essays. Englewood Cliffs, NJ: Prentice-Hall; 1980. p. 143–54.