Jessica Poncho Knitting Pattern

Jessica
Description
A ribbed ponchette. Created by the Daily Knitter staff.
Sizes: One size fits most
Supplies
4 Skeins in Pear Green – Moda Dea TuTu (43% Nylon / 22% Cotton / 22% Acrylic/ 13% Rayon; 1.76 oz / 92 yds)
Circular Knitting Needle – Size US 7, 24″
Circular Knitting Needle – Size US 9, 24″. (Straight needles of same size are also OK)
Stitch Marker
Details
18 sts = approximately 4″ with size 9 needles
Directions
With circular knitting needle, cast on 138 stitches with size 7 needles. Join to work in the round, being careful not to twist stitches. Place marker on needle to indicate beginning of round.
Rounds 1 – 6: (K1, P1) around.
Rounds 7: (K3, P3) around.
Repeat Round 7 until piece measures 3″.
Switch to size 9 needles.
Repeat Round 7 until piece measures 9″.
Bind off loosely. Add 2 strands of fringe to bottom spaced 1″ apart.

In reading the directions for the above there are no directions for how it is to be sewed together. Is it left to the knitters to determine how?