diff --git a/src/card.rs b/src/card.rs
index bd796a0..56c623b 100644
--- a/src/card.rs
+++ b/src/card.rs
@@ -115,19 +115,19 @@ impl Card {
   }
 
   /// Cuts this Card on the given line. Returns two cards
-  pub fn cut(&self, line: CutLine) -> (Self, Self) {
+  pub fn cut(self, line: CutLine) -> (Self, Self) {
     todo!();
   }
 
-  pub fn flip(&self, flip: FlipDir) -> (Self) {
+  pub fn flip(self, flip: FlipDir) -> Self {
     todo!();
   }
 
-  pub fn transpose(&self, other: &Self, selection: TransposeSelection) -> (Self, Self) {
+  pub fn transpose(self, other: Self, selection: TransposeSelection) -> (Self, Self) {
     todo!();
   }
 
-  pub fn rotate(&self, dir: RotationDir) {
+  pub fn rotate(self, dir: RotationDir) {
     todo!();
   }
 }